Return Code = 12 for LSMW data read

Hi all,

I am executing an LSMW that will change 27 classifications for each materials. I have tested running a file with only 100 materials and all is good. Now I am testing a file with 40k materials (90MB file size) but when trying to "read data" from the imported file I get 'Error when uploading file 'J:\Unilever\Test Load LSMW files for 10-01-08\40k' 'Message no. /SAPDMC/LSMW_OBJ_070010'.

I am guessing there's a file size maximum which I have exceeded and that's why the LSMW is not capable of reading it but there in the past has been successfull executions of 25k - 50k materials...

Any help is appreciated, thanks!